<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Demo7</title>
    <script src="build/react.js"></script>
    <script src="build/react-dom.js"></script>
    <script src="build/browser.min.js"></script>
</head>
<body>
    <div id="example"></div>
    <script type="text/babel">
        var MyComponent = React.createClass({
            handleClick: function() {
                this.refs.myTextInput.focus();
            },
            render: function() {
                return (
                    <div>
                        <input type="text" ref="myTextInput" />
                        <input type="button" value="Focus the text input" onClick={this.handleClick} />
                    </div>
                );
            }
        });
        ReactDOM.render(
            <MyComponent />,
            document.getElementById('example')
        );
    </script>
</body>
</html>